- Error code
- OS 1
- Category
- Self-test
- Manufacturer
- KACO
1What the error means
Self-test: the inverter checks the grid parameters and the PV generator voltage before connecting. A normal state every morning.
On the display or in the monitoring software it appears as OS 1.
2Possible causes
- The inverter is running its scheduled test before connecting to the grid
- Failure at some stage of the test
3What to do
- If the indication is momentary, it is normal operation.
- If the inverter stays stuck in the test, it needs diagnosis.
4Repair by Aineas
You send the inverter to our lab in Thessaloniki. We diagnose it, inform you of the fault and the cost, and the repair starts only after you approve it. Every inverter is tested under simulated operating conditions before delivery.